1 //===----------------------------------------------------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 // type_traits
11
12 // make_signed
13
14 #include <type_traits>
15
16 enum Enum {zero, one_};
17
18 enum BigEnum
19 {
20 bigzero,
21 big = 0xFFFFFFFFFFFFFFFFULL
22 };
23
24 #if !defined(_LIBCPP_HAS_NO_INT128) && !defined(_LIBCPP_HAS_NO_STRONG_ENUMS)
25 enum HugeEnum : __uint128_t
26 {
27 hugezero
28 };
29 #endif
30
31 template <class T, class U>
test_make_signed()32 void test_make_signed()
33 {
34 static_assert((std::is_same<typename std::make_signed<T>::type, U>::value), "");
35 #if _LIBCPP_STD_VER > 11
36 static_assert((std::is_same<std::make_signed_t<T>, U>::value), "");
37 #endif
38 }
39
main()40 int main()
41 {
42 test_make_signed< signed char, signed char >();
43 test_make_signed< unsigned char, signed char >();
44 test_make_signed< char, signed char >();
45 test_make_signed< short, signed short >();
46 test_make_signed< unsigned short, signed short >();
47 test_make_signed< int, signed int >();
48 test_make_signed< unsigned int, signed int >();
49 test_make_signed< long, signed long >();
50 test_make_signed< unsigned long, long >();
51 test_make_signed< long long, signed long long >();
52 test_make_signed< unsigned long long, signed long long >();
53 test_make_signed< wchar_t, std::conditional<sizeof(wchar_t) == 4, int, short>::type >();
54 test_make_signed< const wchar_t, std::conditional<sizeof(wchar_t) == 4, const int, const short>::type >();
55 test_make_signed< const Enum, const int >();
56 test_make_signed< BigEnum, std::conditional<sizeof(long) == 4, long long, long>::type >();
57 #ifndef _LIBCPP_HAS_NO_INT128
58 test_make_signed< __int128_t, __int128_t >();
59 test_make_signed< __uint128_t, __int128_t >();
60 # ifndef _LIBCPP_HAS_NO_STRONG_ENUMS
61 test_make_signed< HugeEnum, __int128_t >();
62 # endif
63 #endif
64 }
65